Now there are 28 Tutorials in german. I trie to explain as short as possible because I dont want to steel your precious time.
PastorPixel Affinity Photo german
Specially for Beginners, you can start at the beginning with Basics
There are some Videos about Color Correction, Gradiation, Histogram etc. Tonwertkorrektur
Then you will find 2 Videos with Masks and Cutting out Hair
Layer Basics, Brushes Basic, the nice Panorama feature and many more. I hope you will enjoy it.